Struct ra_ap_cfg::DnfExpr [−][src]
A #[cfg]
directive in Disjunctive Normal Form (DNF).
Implementations
impl DnfExpr
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pub fn new(expr: CfgExpr) -> Self
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pub fn why_inactive(&self, opts: &CfgOptions) -> Option<InactiveReason>
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Computes a list of present or absent atoms in opts
that cause this expression to evaluate
to false
.
Note that flipping a subset of these atoms might be sufficient to make the whole expression
evaluate to true
. For that, see compute_enable_hints
.
Returns None
when self
is already true, or contains errors.
pub fn compute_enable_hints<'a>(
&'a self,
opts: &'a CfgOptions
) -> impl Iterator<Item = CfgDiff> + 'a
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&'a self,
opts: &'a CfgOptions
) -> impl Iterator<Item = CfgDiff> + 'a
Returns CfgDiff
objects that would enable this directive if applied to opts
.
Trait Implementations
Auto Trait Implementations
impl RefUnwindSafe for DnfExpr
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impl Send for DnfExpr
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impl Sync for DnfExpr
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impl Unpin for DnfExpr
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impl UnwindSafe for DnfExpr
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Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,